ORACLE中實現(xiàn)ASCII字符串和16進(jìn)制串互相轉(zhuǎn)換
2024-08-29 13:49:39
供稿：網(wǎng)友
ASCII字符串==>16進(jìn)制串create or replace function AscToHex(sIn IN varchar2)
RETURN varchar2
IS
sTmp varchar2(4000);
i integer;
BEGIN
i:=1;
stmp:='';
for i in 1..length(sIn) loop
sTmp:=sTmptrim(to_char(ascii(substr(sIn,i,1)),'XXXX'));
end loop;
return sTmp;
END; 16進(jìn)制串==>ASCII字符串 要區(qū)分字符集，以中文字符為例，對于數(shù)據(jù)庫字符集是中文，要保證能夠正確轉(zhuǎn)回來，要有所不同。數(shù)據(jù)庫字符集是中文create or replace function HexToAsc(sIn IN varchar2)
RETURN varchar2
IS
sTmp varchar2(4000);
i integer;
x integer;
BEGIN
i:=1;
stmp:='';
loop
exit when i>length(sIn);
x:=to_number(substr(sIn,i,2),'XXXX');
if x>128 then
sTmp:=sTmpchr(to_number(substr(sIn,i,4),'XXXX'));
i:=i+4;
else
sTmp:=sTmpchr(to_number(substr(sIn,i,2),'XXXX'));
i:=i+2;
end if;
end loop;
return sTmp;
END; 數(shù)據(jù)庫字符集是英文create or replace function HexToAsc(sIn IN varchar2)
RETURN varchar2
IS
sTmp varchar2(4000);
i integer;
BEGIN
i:=1;
stmp:='';
loop
exit when i>length(sIn);
sTmp:=sTmpchr(to_number(substr(sIn,i,2),'XXXX'));
i:=i+2;
end loop;
return sTmp;
END; 測試，如下：SQL>select hextoasc(asctohex('你好ABC么')) from dual;
HEXTOASC(ASCTOHEX('你好ABC么'))
-----------------------------------------------------------
你好ABC么
